Today, I have added new tutorials on ROS services useful for beginners users in my Udemy course.
It explains what ROS services are, how to call them using ROS command line, what are the steps to define ROS services, how to create and compile a service file, and how to implement them in Python and C++, with a comparison between both languages.
The course is being developed every day with new tutorials and examples. I am working to make it the most ever comprehensive course for beginners to learn ROS on Udemy platform.